Self-sustaining fog nozzle



July 18, 1950 s. R. WILSON ETAL SELF-SUSTAINING FOG NOZZLE Filed Jan. 20, 1947 Patented July 18, 1950 UNITED STATES PATENT OFFICE 2,515,578, SELF-SUSTAINING FOG NOZZLE Sam R. Wilson and George Kraulik, Vallejo, Calif. Application January 20, 1947, Serial No'. 723,068

2 Claims. (01. 299-409) 1 This invention appertains to new and useful improvements in fire fighting apparatus and has for its general object the provision of novel and improved means to assist and protect fire fighters.

Specific objects of this invention are as follows; to provide means for conducting a mist or fog from the fluid stream within a nozzle; to provide means for controlling the mist or fog extracted from the nozzle; to provide improved means for providing fresh breathing air; to provide an efficient, practical, improved device for protecting firemen in waging their flight against fires.

Other objects and features of novelty, as well as those mentioned hereinabove, will become apparent to those skilled in the art, in following the description of the preferred embodiment of the instant invention, illustrated in the accompanying drawings, wherein:

Figure 1 is a primarily elevational view, with parts in section, showing the preferred embodiment of the instant invention; and,

Figure 2 is an elevational view of the invention disclosed in Figure 1 and taken substantially in the direction of the arrow at 2.

Reference is now made in detail to the illustrated preferred embodiment of the present invention wherein a nozzle is provided and is generally indicated by the numeral ID. This nozzle of relatively conventional structure having the usual handle l2 adjacent the rear thereof and the direction ring I 4 at substantially the center thereof. The usual lugs l6 and iii are provided adjacent the end threaded portion 20 of the said nozzle Ill.

Secured to the cylindrical portion 22 of the said nozzle I0, is a pair of radially disposed conduits 24 and 26 respectively. Any suitable securing means may be used to join these con duits to the longitudinal portion 22. Obviously, they may be screw threaded, brazed, welded, etc. The said conduits 24 and 26 have adjacent the free end thereof elbows or bends 28 thereby directing the dispersing members 30 and 32 forward or in the same general direction as the flow of liquid through the nozzle Ill. The said dispersing means 30 and 32 comprise a simple pair of baffles merely to give direction to the mist or fog picked up by the conduits 24 and 26 from the flow of liquid through the nozzle. In order to eiiect the spray or mist suitable protuberances or rough edges may be projected into the flowing fluid stream thereby dashing a very small quantity of water up into the conduits 24 j 2 V r and 26. It is understood, that the last mentioned expedient is optional and may be used if so desired.

A pair. of valves 34 and 36 are provided in the said conduits 24 and 26 respectively and are adapted to control the flow of mist or fog through the said conduits. Suitable conventional actuating arms 38 may be provided on the valve stem to operate the same.

A conduit 40 having a bent or curvilinear end portion 42 is received longitudinally of the axis of the said nozzle 10. The portion 42 is adapted to project through the nozzle and extend exterior thereof. An elbow portion 44 is provided adjacent the end opposite said portion 42 and projects through a suitable aperture 46 in the said longitudinal portion 22 of the said nozzle It. Suitably secured to the end of the said elbow 44 is a flexible conduit 48 provided of any suitable conventional material. Many conventional securing means may be employed to connect said conduit 48 with the said elbow 44, however, the removable threaded connection 50 is preferable. Operatively connected to the end opposite the said threaded connection is a suitable mask 52 adapted to be received over the face of a fireman. Suitable straps 54 and 56 may be employed to secure the mask over the firemans face, however, this forms no part of the instant invention and accordingly any suitable conventional securing means may be used.

As Water is introduced into the nozzle as is conventional, a high rate of flow is encountered therein. Air is co-mingled with the water flowiIlg through the said nozzle thereby assisting in the fog or mist extracting means discussed hereinabove. Further, due to the shape of the member 42'the fluid dynamic characteristics of the flowing water in the nozzle act on the exposure of the member 42 thereby rendering breathing of the firemen easier and cleaner, the mask 52 protecting the operator or fireman from a great majority of the smoke.

There has been described the preferred embodiment of an invention which recites improvements in fire fighting apparatus. Since there has been described only a single preferred embodiment of the instant inventive concept limitation is sought in accordance with the scope of the appended claims and not to the exclusion of various other embodiments falling in the purview of this invention.

Having thus described our invention what is claimed as novel and improved is:

1. A fire fighting protection device comprising a nozzle, means for conducting air in said nozzle, a mask secured to said conducting means, said conducting means including a conduit extending longitudinally within said nozzle, a bend at the one end thereof exterior of said nozzle adapted to be exposed to the fluid dynamic properties of the flowing water in said nozzle after it passes therethrough, an elbow at the other end of said conduit extending through said nozzle, and another conduit secured to the terminal portion of said elbow and having said mask secured thereto.

2. A fire fighting protection device comprising a nozzle, means for conducting air in said nozzle, a mask secured to said conducting means, said conducting means including a conduit extending longitudinally within said nozzle, a bend at the one end thereof adapted to be exposed to the fluid dynamic properties of the flowing water in said nozzle, an elbow at the other end of said conduit extending through said nozzle, and a flexible conduitsecured to the terminal portion of said elbow and having said mask secured thereto.

SAM R. WILSON. GEORGE KRAULIK.

4 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 36,688 Morrison Oct. 14, 1862 592,447 Richardson Oct. 26, 1897 616,757 Wright Dec. 27, 1898 769,602 Fisher Sept. 6, 1904 898,524 Sullivan Sept. 15, 1908 1,055,946 Scheer Mar. 11, 1913 1,808,281 Balthazor June 2, 1931 1,826,208 Gibson Oct. 6, 1931 1,838,438 Nichols Dec. 29, 1931 2,331,741 Smith Oct. 12, 1943 FOREIGN PATENTS Number Country Date 3,600 Great Britain Feb. 16, 1903 7,668 Great Britain May 25, 1888 

